Removing the battery is quasi a reset.
Could work or not.
Otherwise :
Checking the battery and if it’s defective go for a new one.
btw : How long are you using the L70 and how often per week?
Eufy Robovac L70 dies while vacuming
Didn’t try removing the battery yet but have reset via dedicated button. I’ve had the L70 for two weeks and it’s only been used for vacuuming. No problems if I clean by zones (c. 15sqm which takes c. 15minutes) with short recharge in between but if I leave it for longer than a 20 minute clean it seems that it cannot cope! The total floor space is ~50sqm and is all tiled with exception of a 3sqm rug. Using normal suction power with boost for the rug, but issue occurs if it’s been cleaning the rug or not.
If its a new item you should contact the EUFY support,.
Don’t forget to add model-number and date of purchase, bill etc.
All data you have,